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Other telescope product lines include the CGE, CGEM, CPC, NexStar, Omni, Onyx, AstroMaster, Ambassador, TravelScope,StarSense Explorer and PowerSeeker product lines. [10] These range from large computerized reflectors with GPS to decorative/casual viewing telescopes with brass tube refractors on wood mounts. Celestron products (as of 2010) include:
Primary lens: The objective of a refracting telescope. Primary mirror: The objective of a reflecting telescope. Corrector plate: A full aperture negative lens placed before a primary mirror designed to correct the optical aberrations of the mirror. Schmidt corrector plate: An aspheric-shaped corrector plate used in the Schmidt telescope.
1FGL, 2FGL [4] — Lists of gamma-ray sources from the Large Area Telescope on board the Fermi Gamma-ray Space Telescope; 1RXH — ROSAT HRI Pointed Observations; 1RXS — ROSAT All-Sky Bright Source Catalogue, ROSAT All-Sky Survey Faint Source Catalog; 1SWASP — SuperWASP; 2A — see 1A; 2C — Second Cambridge Catalogue of Radio Sources
Tasco mainly imports telescopes for amateur astronomers but has expanded into other optical products, such as spotting scopes, microscopes, binoculars, telescopic sights, and other rifle accessories. Tasco sells via retail stores , catalogs , and online retailers .
Smart telescopes were introduced to the consumer market in the 2010s. They are self contained astronomical imaging devices that combine a small (50mm to 114mm objective) telescope and GoTo technology with pre-packaged software designed for astrophotography of deep-sky objects .
Edmund Scientific Corporation, based in Barrington, New Jersey, was founded in 1942 as a retailer of surplus optical parts like lenses.It later branched out into complete systems like telescopes and microscopes, and in the 1960s, a wide variety of science toys and kits.
Horseshoe mount on the Hale Telescope. The horseshoe mount overcomes the design disadvantage of English or Yoke mounts by replacing the polar bearing with an open "horseshoe" structure to allow the telescope to access Polaris and stars near it. The Hale Telescope is the most prominent example of a horseshoe mount in use. [8]
ESO Science Archive has been providing access to data from astronomical catalogues since 1988. [1]An astronomical catalogue or catalog is a list or tabulation of astronomical objects, typically grouped together because they share a common type, morphology, origin, means of detection, or method of discovery.